Cascade

A no-code automation builder for workflows that need to run the same way every time. Every step is deterministic: nothing in the execution path depends on an AI model making a judgement call.

Step types and execution rules

Eight step types cover most of what a workflow needs to do:

HTTP calls out to any external HTTP or HTTPS endpoint, with server-side SSRF protection, and passes the response headers and JSON body into whatever comes next.
Connector talks to OAuth integrations, Slack, GitHub, Notion, Google Sheets, using credentials secured server-side rather than in the flow itself.
Hollow Tool runs a native suite action directly as a step: create tasks, send a Yap message, update a workbook, query contacts.
Code runs your own logic in an isolated, standard-library-only sandbox, written in HollowScript (with declared uses capability statements), JavaScript, or Python.
Filter evaluates a predicate written in HEL expression syntax, branching execution or halting cleanly.
Loop iterates over an array a prior step produced, with a maximum-iteration guard so nothing runs away.
Delay pauses in place for a short wait, or suspends a long-running flow durably across much longer windows.
Approval stops the flow until a human administrator approves or rejects it, then branches on whatever they decided.

Data expressions and Secrets Vault

Pull an output from an earlier step with {{ steps.STEP_NAME.output }}. Keep API keys and private tokens out of the flow entirely: store them in the encrypted Secrets Vault and reference them as {{ secrets.NAME }}. Secrets Vault values stay encrypted at rest and are masked out of every execution log and preview.

Triggers and execution logs

Run a flow on demand, on a cron schedule (standard 5-field syntax), or from an inbound webhook URL. The Runs view keeps every historical execution: per-step input payloads, output responses, execution times, and failure alerts, all inspectable after the fact.

Cascade

A no-code automation builder for workflows that need to run the same way every time. Every step is deterministic: nothing in the execution path depends on an AI model making a judgement call.

Step types and execution rules

Eight step types cover most of what a workflow needs to do:

HTTP calls out to any external HTTP or HTTPS endpoint, with server-side SSRF protection, and passes the response headers and JSON body into whatever comes next.
Connector talks to OAuth integrations, Slack, GitHub, Notion, Google Sheets, using credentials secured server-side rather than in the flow itself.
Hollow Tool runs a native suite action directly as a step: create tasks, send a Yap message, update a workbook, query contacts.
Code runs your own logic in an isolated, standard-library-only sandbox, written in HollowScript (with declared uses capability statements), JavaScript, or Python.
Filter evaluates a predicate written in HEL expression syntax, branching execution or halting cleanly.
Loop iterates over an array a prior step produced, with a maximum-iteration guard so nothing runs away.
Delay pauses in place for a short wait, or suspends a long-running flow durably across much longer windows.
Approval stops the flow until a human administrator approves or rejects it, then branches on whatever they decided.